Scientists have made the most accurate test of the law of universal gravitation

In order to make the change, the scientists have created a device with which it is possible to maximize the

To determine the exact force with which spheres of gold with a diameter of only a millimeter attract each otherand a weight of 90 mg.

Previously, similar measurements were carried out for objectsweighing a kilogram or more, and we did this with spheres weighing 90 mg. This opens the way for even more precise measurements for example, for bodies comparable in mass to the largest elementary particles. 

Research text

Professor at Marcus University ViennaAspelmeyer and his colleagues traced how, as the balls moved away and closer to each other, they were attracted by another golden sphere, which the scientists placed at a short distance from one of the balls.

They used the information obtained to calculate the gravitational constant G, the value of which was not determined as accurately as possible.

As a result, the authors of the experiment obtained a relatively accurate value of G, which differs from generally accepted estimates by about 9%.

Scientists are going to continue to work to check if this discrepancy was a simple measurement error, or if it really exists.

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